US6960851B2 - Cooling device including a biasing element - Google Patents

Cooling device including a biasing element Download PDF

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Publication number
US6960851B2
US6960851B2 US10/726,397 US72639703A US6960851B2 US 6960851 B2 US6960851 B2 US 6960851B2 US 72639703 A US72639703 A US 72639703A US 6960851 B2 US6960851 B2 US 6960851B2
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US
United States
Prior art keywords
cooling device
cooling
spring
wedging
stator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/726,397
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English (en)
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US20050116553A1 (en
Inventor
Stéphane Poulin
Martin Houle
Louis-Philippe Bibeau
François Messier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dana TM4 Inc
Original Assignee
TM4 Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TM4 Inc filed Critical TM4 Inc
Assigned to TM4 INC. reassignment TM4 INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BIBEAU, LOUIS-PHILIPPE, HOULE, MARTIN, MESSIER, FRANCOIS, POULIN, STEPHANE
Priority to US10/726,397 priority Critical patent/US6960851B2/en
Priority to JP2006541768A priority patent/JP4637851B2/ja
Priority to PCT/CA2004/002026 priority patent/WO2005055395A1/fr
Priority to EP04802203A priority patent/EP1700369A4/fr
Priority to CA002539593A priority patent/CA2539593C/fr
Priority to KR1020067009962A priority patent/KR100943330B1/ko
Publication of US20050116553A1 publication Critical patent/US20050116553A1/en
Publication of US6960851B2 publication Critical patent/US6960851B2/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/025—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by having a particular shape
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/225—Heat pipes

Definitions

  • the present invention relates to cooling devices. More specifically, the present invention is concerned with a cooling device including a biasing element to removably secure the cooling device inside a stator of an electric machine.
  • a cooling device is connected to the electric machine to draw away excess heat.
  • the cooling device typically includes means for dissipating the heat, such as, for example, fins, heat pipes or passageways suitable for allowing the circulation of a cooling fluid.
  • the cooling device To draw heat from the electric machine, the cooling device has to be in physical contact with, and at a lower temperature than, the electric machine. Prior to operating, the cooling device and the motor are at a common temperature. However, because they differ in temperatures when operating, the electric machine typically undergoes a thermal expansion different from a thermal expansion of the cooling device. This difference in thermal expansion may render the physical contact between the electric machine and the cooling device unsatisfactory.
  • the cooling device it is well known in the art to glue the cooling device to the electric machine with a heat-conducting adhesive.
  • the adhesive may not be strong enough to ensure that the physical contact is maintained. This may happen because the cooling device, as its temperature is lower, will typically expand less than the operating electric machine. Consequently, the cavity might become large enough to overwhelm the adhesive capacity of the adhesive.
  • An object of the present invention is therefore to provide an improved cooling device including a biasing element.
  • a cooling device for an internal stator of an electric machine the stator including a substantially cylindrical cavity defining a substantially cylindrical internal surface, the cooling device comprising:
  • an electric machine comprising a cooling device for an internal stator of an electric machine, the stator including a substantially cylindrical cavity defining a substantially cylindrical internal surface, the cooling device including:
  • a cooling device for an internal stator of an electric machine including a substantially cylindrical cavity defining a substantially cylindrical internal surface, the cooling device comprising:
  • a cooling device for an internal stator of an electric machine comprising:
  • FIG. 1 is a perspective view of an embodiment of a cooling device according to an embodiment of the present invention positioned in a cavity of a stator of an electric machine;
  • FIG. 2 is a perspective view of the cooling device of FIG. 1 ;
  • FIG. 3 is a perspective exploded view of the cooling device of FIG. 1 ;
  • FIG. 4 is a top plan view of the cooling device of FIG. 1 ;
  • FIG. 5 is a side cross-sectional view taken along line 5 — 5 of FIG. 4 ;
  • FIG. 6 is a perspective view illustrating an insertion of a cooling device according to a second embodiment of the present invention into a cavity of a stator of an electric machine;
  • FIG. 7 is a top plan view of a third embodiment of a cooling device for a stator of an electric machine
  • FIG. 8 is a top plan view of a fourth embodiment of a cooling device for a stator of an electric machine
  • FIG. 9 is a top plan view of a fifth embodiment of a cooling device for a stator of an electric machine.
  • FIG. 10 is a top plan view of yet a sisth embodiment of a cooling device for a stator of an electric machine
  • FIG. 11 is a top plan view of a seventh embodiment of a cooling device for a stator of an electric machine.
  • FIG. 12 is a top plan view of an eight embodiment of a cooling device for a stator of an electric machine.
  • embodiments of the present invention provide an efficient means for mounting a cooling device inside a stator of an electric machine.
  • the electric machine may be of the internal stator—external rotor type.
  • the general principle is to provide a biasing element, integral or external with the cooling body that will ensure an adequate contact between the cooling body and the internal surface of the stator.
  • FIG. 1 shows a cooling device 20 mounted in an internal stator 22 of an electric machine.
  • the stator 22 includes a cylindrical cavity 24 having a cylindrical internal surface 26 .
  • the cooling device 20 includes a body 28 defining an external cylindrical contact surface 30 , a top surface 32 and a bottom surface 34 .
  • a top cover 36 and a bottom cover 38 are removably mounted to the top and bottom surfaces, respectively.
  • the covers 36 and 38 are used to close a cooling passageway provided in the body 28 .
  • the cooling passageway 40 includes an inlet 42 for accepting the cooling fluid and an outlet 44 for releasing the cooling fluid.
  • the cooling fluid takes heat away from the body 28 , thereby allowing the body 28 to maintain a temperature lower than a temperature of the stator 22 .
  • Apparatuses and methods for causing a circulation of a cooling fluid in the cooling passageway and means for disposing of the heat taken away by the cooling fluid are well known in the art and will therefore not be discussed in further details.
  • the cooling passageway includes a plurality of indentations 46 in each of the top and bottom surfaces 32 and 34 and a plurality of cooling conduits 48 extending generally axially through the body 28 .
  • the cooling conduits 48 are in a fluid communication relationship with the indentations 46 .
  • Each of the top and bottom covers 36 and 38 is generally shaped as the top and bottom surfaces 32 and 34 of the body 28 and close the indentations 46 to produce, in conjunction with the cooling conduits 48 , a closed passageway for accepting the cooling fluid.
  • the cooling device 20 also includes a biasing assembly 50 that is so configured and sized as to bias the contact surface 30 of the body 28 against the internal surface 26 of the stator 22 when the cooling device 20 is positioned inside the cavity 24 .
  • the biasing assembly 50 includes first and second wedging devices 52 and 54 maintained together by fastening assemblies 56 .
  • the biasing assembly 50 is to be mounted to the body 28 via opposed surfaces 58 and 60 of the body 28 as will be described hereinbelow. These opposed surfaces are defined by the generally C-shape of the body 28 .
  • first and second opposed surfaces 58 and 60 are convex. More specifically, each of the first and second surfaces 58 and 60 present a substantially trapezoidal cross-section, as can be better seen from FIG. 4 .
  • first and second wedging devices 52 and 54 each have a trapezoidal cross-section and have a longitudinal dimension substantially equal to a longitudinal dimension of the body 28 .
  • Each fastening assembly 56 includes a deformable and biasing portion that transmits a reaction force to the first and second wedging devices 52 and 54 as will be described hereinbelow.
  • each of the first and second wedging devices 52 and 54 includes fastening apertures 62 to accept a part of the fastening assembly. Furthermore, the wedging device 52 includes shoulder portions 64 to accept the head of a fastener.
  • Each fastening assembly 56 includes a bolt 66 inserted through the shoulder portion 64 and the matched fastening apertures 62 of the first and second wedging devices 52 and 54 .
  • a deformable portion in the form of a disc springs 68 is inserted onto each bolt 66 between the second wedging device 54 and a respective first nut 70 .
  • the disc springs 630 include, for example, one or more Belleville spring washers mounted in series. However, many other types of disc springs could be used.
  • a second nut 72 is threaded onto each bolt 66 to positively lock the nuts onto the bolt.
  • the cooling device 20 without the biasing assembly 50 , or with the biasing assembly 50 in an non-biasing position is inserted inside the cavity 24 of the stator 22 .
  • the nuts 70 of the fastening assemblies 56 are then tightened until a good contact exists between the external surface 30 of the body 28 and the internal surface 26 of the stator 22 .
  • the wedging devices 52 and 54 are pulled towards one another.
  • the corresponding trapezoidal shape of the wedging devices 51 and 54 and of the first and second opposed surfaces 58 and 60 force the opposed surfaces 58 and 60 apart from one another, thereby forcing the external surface 30 onto the internal surface 26 .
  • the cooling device 20 draws heat away from the stator 22 . Specifically, whenever a temperature of the electric machine is higher than a temperature of the body 28 , heat flows away from the stator 22 through the internal surface 26 of the cavity 24 to enter the body 28 through the contact surface 30 .
  • the stator 22 optionally includes a key 74 extending from the internal surface 26 , and the body 28 includes a keyway 76 in the contact surface 30 .
  • the keyway 76 is configured and sized to engage the key 74 , thereby preventing a rotational motion of the cooling device 20 inside the stator 22 .
  • the cylindrical shape of the cavity 26 and of the body 28 which produce a circular cross-section, is not essential.
  • the body and the cavity could assume various cross-sections, such as an ovoid, an ellipse or a polygon, among others (not illustrated in the drawings).
  • the body and the cavity can assume any suitable shape as long as they allow the biasing assembly to bias the contact surface of the body against the internal surface of the stator when the cooling device is positioned inside the cavity.
  • FIG. 6 of the appended drawings an alternate embodiment of a cooling device 100 will briefly be described. For concision purposes, only the differences between the cooling device 20 and the cooling device 100 will be described hereinbelow.
  • the main difference concerns cooling passageway that includes an indentation 102 in the contact surface 104 of the body 106 .
  • the indentation is configured to receive a cooling tube 108 having an inlet 110 and an outlet 112 .
  • the cooling fluid may circulate in the cooling tube 108 .
  • the indentation 102 assumes a generally horizontally oriented serpentine geometric configuration and is in direct contact with the internal surface 26 of the stator 22 .
  • the reader skilled in the art will readily appreciate that many other suitable geometric configuration are possible without detracting from the claimed invention.
  • biasing assembly 50 is identical to the biasing assembly of FIGS. 1 to 5 .
  • the biasing element includes an expansion spring positioned between and connected to the first and second opposed surfaces.
  • the expansion spring can take many forms.
  • a cooling device 200 has first and second opposed surfaces 202 and 204 each including a respective generally T-shaped protrusion 206 and 208 .
  • the generally T-shaped protrusions are so configured and shaped as to retain an expansion spring in the form of two generally cylindrical leaf-springs 210 and 212 by each enclosing a side of one of the generally cylindrical leaf-springs.
  • Each generally cylindrical leaf-spring 210 and 212 extends from the top surface of the body 214 to the bottom surface of the body.
  • the body 214 also includes apertures 216 and 218 provided near each of the opposed faces 202 and 204 .
  • the apertures 216 and 218 are used to compress the body 214 (see dashed lines) to allow the insertion of the body inside the stator (not shown). More specifically, pins (not shown) are inserted in the apertures 216 and 218 and are moved towards one another (see arrows 220 ) to compress the springs 210 and 212 to thereby overcome the biasing action of the springs and allow the deformation of the body for its insertion in the stator. When the body is inserted in the stator, the pressure on the pins may be relaxed that the biasing action of the springs force the contact between the contact surfaces.
  • a cooling device 300 includes generally flat opposed surfaces 302 and 304 and two leaf-springs 306 and 308 are maintained in notches 310 extending longitudinally on the opposed surfaces 302 and 304 .
  • the generally cylindrical leaf-springs 302 and 304 are similar in shape and function to the leaf-springs 210 and 202 shown on FIG. 7 .
  • apertures 216 and 218 are provided to compress the leaf-springs 302 and 304 .
  • a cooling device 400 includes one leaf-spring 402 that is retained between the two opposed surfaces 404 and 406 by two notches 408 extending longitudinally on the second opposed surface 406 .
  • the first opposed surface 404 can be flat, as illustrated.
  • the leaf-spring 402 is similar in shape and function to the leaf-springs 202 and 212 .
  • a cooling device 500 includes one or more coil springs 502 are inserted between the first and second opposed surfaces 504 and 506 within two shoulders 508 .
  • Each shoulder 508 is located on one of the first and second opposed surfaces 504 and 506 and receives one end of one of the coil springs 502 .
  • a cooling device 600 includes a body 602 includes an integral spring 604 .
  • the spring 604 is defined by a first longitudinal cut tangential to the external surface 606 , the first cut defining a first channel 608 within the body 602 .
  • the spring 604 further includes a second longitudinal cut tangential to the internal surface 610 , the second cut defining a second channel 612 within the body 602 .
  • the first and second channels 608 and 612 allow an elastic deformation of the spring 604 as can be seen in dashed lines in FIG. 11 . It is believed that one skilled in the art will be in a position to determine the dimension and number of the cuts that should be made to the body 602 to enable a sufficient elastic deformation of the body 602 for its insertion into the stator.
  • FIG. 12 A cooling device 700 according to an eight embodiment of the present invention is illustrated in FIG. 12 .
  • the cooling device 700 includes two identical body elements 702 and 704 together defining a generally circular cross-section body.
  • the interconnection between the body elements 702 and 704 is identical to the interconnection between the facing ends 202 and 204 of the cooling device 200 of FIG. 7 and will therefore not be described further for concision purposes.
  • biasing means used to force the external surface of the body elements 702 and 704 towards the internal contact surface of the stator could be different, for example as illustrated in the other embodiments herein.
  • Having two body elements 702 and 704 may be interesting in some situations since it is not required to exert a compressive force to insert the body elements into the stator since the elements may be inserted one at a time and the biasing elements can be mounted thereto once the elements are in the stator.
  • the components of the cooling device are metallic. While not essential to the invention, the use of metals provide suitable strength and heat conduction capability to the cooling device. For example, aluminum has been used successfully. Alternatively, some of the elements, such as the covers 36 and 38 could be made of other materials, such as composite material, if weight is an issue for a particular application.
  • the cooling device is inserted into the cavity as follows. First, an external compressive force is exerted on the body. The external force deforms the body and is transmitted to a spring included in the cooling device, thereby causing the spring to deform. In the drawings, the deformation of the body under the external force is illustrated by dashed contours slightly offset from the solid lines representing the body. Further to an insertion of the cooling device into the cavity, the external force is removed. Then, the spring causes an expansion force to be applied on the body, thereby biasing the contact surface of the body against the internal surface of the stator.
  • cooling devices all use tubes carrying a cooling fluid to remove excess heat from the body of the cooling device
  • other excess heat removal devices such as fins and/or heat pipes could be used.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
US10/726,397 2003-12-02 2003-12-02 Cooling device including a biasing element Expired - Fee Related US6960851B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US10/726,397 US6960851B2 (en) 2003-12-02 2003-12-02 Cooling device including a biasing element
CA002539593A CA2539593C (fr) 2003-12-02 2004-11-24 Dispositif de refroidissement comprenant un element de sollicitation
PCT/CA2004/002026 WO2005055395A1 (fr) 2003-12-02 2004-11-24 Dispositif de refroidissement comprenant un element de sollicitation
EP04802203A EP1700369A4 (fr) 2003-12-02 2004-11-24 Dispositif de refroidissement comprenant un element de sollicitation
JP2006541768A JP4637851B2 (ja) 2003-12-02 2004-11-24 付勢部材を備えた冷却デバイス
KR1020067009962A KR100943330B1 (ko) 2003-12-02 2004-11-24 편향부재를 포함하는 냉각장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/726,397 US6960851B2 (en) 2003-12-02 2003-12-02 Cooling device including a biasing element

Publications (2)

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US20050116553A1 US20050116553A1 (en) 2005-06-02
US6960851B2 true US6960851B2 (en) 2005-11-01

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US10/726,397 Expired - Fee Related US6960851B2 (en) 2003-12-02 2003-12-02 Cooling device including a biasing element

Country Status (6)

Country Link
US (1) US6960851B2 (fr)
EP (1) EP1700369A4 (fr)
JP (1) JP4637851B2 (fr)
KR (1) KR100943330B1 (fr)
CA (1) CA2539593C (fr)
WO (1) WO2005055395A1 (fr)

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US20070052305A1 (en) * 2005-08-10 2007-03-08 Jane Roundell Electric Machine Provided With An Internal Stator
US20070152518A1 (en) * 2003-12-04 2007-07-05 Tm4 Inc. Cooling assembly for electric machine
US20090160269A1 (en) * 2007-12-20 2009-06-25 Thomas Bischof Electromotor
US20100176669A1 (en) * 2009-01-13 2010-07-15 Martin Houle Liquid Cooling Arrangement for Electric Machines
US20110278968A1 (en) * 2008-07-28 2011-11-17 Tm4 Inc. Multi-Path Liquid Cooling Arrangement for Electric Machines
US20150028728A1 (en) * 2012-02-20 2015-01-29 Tm4 Inc. Modular cooling arrangement for electric machine
US20150084453A1 (en) * 2013-09-23 2015-03-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Electrical machine for use in the automotive sector
US20160172940A1 (en) * 2013-07-09 2016-06-16 Schaeffler Technologies AG & Co. KG Cooling system for a dynamoelectric machine
US9397537B2 (en) 2011-11-08 2016-07-19 Tm4 Inc. Cooling assembly for electric machines
US10530221B2 (en) * 2017-11-30 2020-01-07 Industrial Technology Research Institute Cooling structure integrated with electric motor and controller

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EP2062273A4 (fr) 2006-09-13 2012-11-28 Tm4 Inc Ensemble d'inductances pour machine electrique
US7906878B2 (en) * 2007-11-06 2011-03-15 Tm4 Inc. Cooling assembly for large diameter electric machines
US20090322460A1 (en) * 2008-06-25 2009-12-31 Lin Hsun-I High-frequency switching-type direct-current rectifier
US20120318479A1 (en) * 2011-06-14 2012-12-20 Fukuta Electric & Machinery Co., Ltd. Liquid cooled motor assembly and cover thereof
CA2995609C (fr) * 2015-08-19 2021-12-07 Tm4 Inc. Agencement de refroidissement coule pour machines electriques
CN105099097B (zh) * 2015-09-21 2018-04-10 浙江金龙电机股份有限公司 铸铝转子与转子轴低压低温过盈装配机及其装配方法
CN106516064B (zh) 2016-10-26 2020-01-21 广东逸动科技有限公司 船用推进器
DE102018212794A1 (de) * 2018-07-31 2020-02-06 Volkswagen Aktiengesellschaft Kühlmittelleitelement, Kühlsystem und elektrische Maschine
DE102018220183A1 (de) * 2018-11-23 2020-06-10 Volkswagen Aktiengesellschaft Kühlmittelleitelement und Kühlsystem für eine elektrische Maschine

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US20070152518A1 (en) * 2003-12-04 2007-07-05 Tm4 Inc. Cooling assembly for electric machine
US7474021B2 (en) * 2003-12-04 2009-01-06 Tm4 Inc. Cooling assembly for electric machine
US7471023B2 (en) 2005-08-10 2008-12-30 Tm4 Inc. Electric machine provided with an internal stator
US20070052305A1 (en) * 2005-08-10 2007-03-08 Jane Roundell Electric Machine Provided With An Internal Stator
US8110960B2 (en) * 2007-12-20 2012-02-07 Sycotec Gmbh & Co. Kg Electromotor with a stator having cooling conduits
US20090160269A1 (en) * 2007-12-20 2009-06-25 Thomas Bischof Electromotor
US8643233B2 (en) * 2008-07-28 2014-02-04 Tm4 Inc. Multi-path liquid cooling arrangement for electric machines
US20110278968A1 (en) * 2008-07-28 2011-11-17 Tm4 Inc. Multi-Path Liquid Cooling Arrangement for Electric Machines
US8378534B2 (en) 2009-01-13 2013-02-19 Tm4 Inc. Liquid cooling arrangement for electric machines
CN102341999A (zh) * 2009-01-13 2012-02-01 Tm4股份有限公司 用于电动机器的流体冷却装置
WO2010081216A1 (fr) * 2009-01-13 2010-07-22 Tm4 Inc. Agencement de refroidissement liquide pour machines électriques
CN102341999B (zh) * 2009-01-13 2013-08-14 Tm4股份有限公司 用于电动机器的流体冷却装置
US20100176669A1 (en) * 2009-01-13 2010-07-15 Martin Houle Liquid Cooling Arrangement for Electric Machines
US9397537B2 (en) 2011-11-08 2016-07-19 Tm4 Inc. Cooling assembly for electric machines
US20150028728A1 (en) * 2012-02-20 2015-01-29 Tm4 Inc. Modular cooling arrangement for electric machine
US9748821B2 (en) * 2012-02-20 2017-08-29 Tm4 Inc. Modular cooling arrangement for electric machine
US20160172940A1 (en) * 2013-07-09 2016-06-16 Schaeffler Technologies AG & Co. KG Cooling system for a dynamoelectric machine
US10224785B2 (en) * 2013-07-09 2019-03-05 Schaeffler Technologies AG & Co. KG Cooling system for a dynamoelectric machine
US20150084453A1 (en) * 2013-09-23 2015-03-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Electrical machine for use in the automotive sector
US9461525B2 (en) * 2013-09-23 2016-10-04 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Electrical machine for use in the automotive sector
US10530221B2 (en) * 2017-11-30 2020-01-07 Industrial Technology Research Institute Cooling structure integrated with electric motor and controller

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WO2005055395A1 (fr) 2005-06-16
EP1700369A1 (fr) 2006-09-13
CA2539593A1 (fr) 2005-06-16
US20050116553A1 (en) 2005-06-02
KR20060129197A (ko) 2006-12-15
KR100943330B1 (ko) 2010-02-19
JP4637851B2 (ja) 2011-02-23
JP2007513596A (ja) 2007-05-24
EP1700369A4 (fr) 2009-02-25
CA2539593C (fr) 2009-07-28

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